Diphenylene dioxid.



War

UN}? FATENT @FFECE BUIDOLF ZAERTLING AND HERMANN FRIEDRICH, OF LEVERKUSEN, GERMANY, AS- SIGNOBS TO FARBENFABRIKEN VORM. FRIEDR. BAYER & 00., F ELBERFELD, GERMANY, A CORPORATION.

DIPHENYLENE 2310x111.

@Sfififi. Specification of Letters Patent Patenfiefl Jam-i4 119111,

Ii'o Drawing. Applicscion filed May 5, 1910. Serial No. 559,490.

T0 aZZ wiwm it may'concwn: ether end alcohol, and is formed probably fie it known that We, RUDOLF ZAERTLING according to the following eq uation: and HERMANN FRIEDRICH, doctors of philcsophy, chemisis, citizens of the German I Q H 0H 5 Empire, residing at Leverlm'sen, near @0- 6 4 m lcgzic, Germany, have invented new and usev, I g m @mprovements in Processesifer Procluc 1 i T 111g liiphenylenc Dioxid, of which the fcl- G H T lowing is a specification. 0 M

M 0m invention relates to a, new in ocess for plcclucing diphenylene dioxicl, W lCh LOI'OC- consists in ligating who? Grain-swore of 0rth0-cl1l0ropl1en0l e. g. the s0clium still pileno'ican be used.

in cider to illustrate the new P Q We claim:

111101? 5 iiei'iewins examPle glven, The herein described process of prmliicing file parts being y: s y Ortho' d'iphenylenc (lioxid, which process copsisi-s ch p (P Salt) Obmmable by in heating a salt of oitho-clilcroplienol and evaporating 6 parts f OIiShO-(901011ofphefflfi)l distilling off the resulting product using c 45 l and 232 part-s of (49.8 per cent.) 1s Vacuum. I

2% slowly heated in an Iron retort abDVG 220 In testin' ony whereof we have hereuni- 11 Yaw!) under a P of set our hands in the presence of two submm. the diphenylene dioxid (listlls over. It ibi Witnassea forms after cooling long needles. After ibe-' R D ZAERTLINQ [1 SJ Washed with e 5 eye-cent. solution of HE FRIEDRICH. so} NsQl-I water it me is at isle-119 c. It Witnessesg w is incmlw nln in WM M. mm: Jami; nun

It is a, valuable intermediate cbmpounci the manufacture of dyes. Uthei salts e. e. 

